Typescript（或angular2）错误：没有RuntimeMetadataResolver的提供程序

时间：2016-11-24 10:52:12

标签： angular typescript

我在Typescript / Angular2语言中 new 。我正在尝试从Typescript书开发示例应用程序，但我总是收到以下错误：

No provider for RuntimeMetadataResolver (ComponentResolver -> RuntimeCompiler -> RuntimeMetadataResolver)

在浏览器控制台中。 我认为问题出在packages.json中的组件版本中。 Angular2已使用npm install安装，因此版本为2.0beta17。

堆栈跟踪：

BaseException@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:25797:23 [angular]
AbstractProviderError@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:26406:9 [angular]
NoProviderError@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:26442:9 [angular]
ReflectiveInjector_.prototype._throwOrNull@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27967:19 [angular]
ReflectiveInjector_.prototype._getByKeyDefault@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27995:20 [angular]
ReflectiveInjector_.prototype._getByKey@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
ReflectiveInjector_.prototype._getByReflectiveDependency@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27948:16 [angular]
ReflectiveInjector_.prototype._instantiate@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27845:31 [angular]
ReflectiveInjector_.prototype._instantiateProvider@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27817:20 [angular]
ReflectiveInjector_.prototype._new@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27806:16 [angular]
ReflectiveInjectorDynamicStrategy.prototype.getObjByKeyId@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27461:36 [angular]
ReflectiveInjector_.prototype._getByKeyDefault@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27986:23 [angular]
ReflectiveInjector_.prototype._getByKey@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
ReflectiveInjector_.prototype._getByReflectiveDependency@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27948:16 [angular]
ReflectiveInjector_.prototype._instantiate@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27845:31 [angular]
ReflectiveInjector_.prototype._instantiateProvider@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27817:20 [angular]
ReflectiveInjector_.prototype._new@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27806:16 [angular]
ReflectiveInjectorDynamicStrategy.prototype.getObjByKeyId@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27461:36 [angular]
ReflectiveInjector_.prototype._getByKeyDefault@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27986:23 [angular]
ReflectiveInjector_.prototype._getByKey@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
ReflectiveInjector_.prototype.get@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27767:16 [angular]
coreLoadAndBootstrap/<@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36582:33 [angular]
ApplicationRef_.prototype.run/<@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36774:26 [angular]
NgZoneImpl/this.inner<.onInvoke@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32701:32 [angular]
Zone.prototype.run@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:117:24 [<root> => angular]
NgZoneImpl.prototype.runInner@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32732:60 [<root>]
NgZone.prototype.run@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32968:51 [<root>]
ApplicationRef_.prototype.run@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36772:9 [<root>]
coreLoadAndBootstrap@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36581:12 [<root>]
bootstrap@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68267:12 [<root>]
@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68328:1 [<root>]
@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:1:2 [<root>]
  index.js:45341:13
    BrowserDomAdapter.prototype.logError file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:45341:13
    ExceptionHandler.prototype.call file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:25704:13
    ApplicationRef_.prototype.run/< file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36783:17
    ZoneDelegate.prototype.invoke file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:233:17
    NgZoneImpl/this.inner<.onInvoke file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32701:32
    ZoneDelegate.prototype.invoke file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:232:17
    Zone.prototype.run file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:117:24
    NgZoneImpl.prototype.runInner file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32732:60
    NgZone.prototype.run file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32968:51
    ApplicationRef_.prototype.run file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36772:9
    coreLoadAndBootstrap file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36581:12
    bootstrap file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68267:12
    <anonimo> file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68328:1
    <anonimo>

的package.json：

{
  "name": "weather-widget",
  "version": "1.0.0",
  "private": true,
  "description": "",
  "dependencies": {
    "angular2": "^2.0.0-beta.17",
    "es6-shim": "^0.35.1",
    "reflect-metadata": "^0.1.2",
    "rxjs": "^5.0.0-beta.6",
    "zone.js": "^0.6.12"
  },
  "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-sourcemaps": "^1.9.1",
    "gulp-typescript": "^3.1.3",
    "gulp-uglify": "^2.0.0",
    "small": "^0.2.7"
  }
}

LIB / index.ts：

import "zone.js";
import "rxjs";
import "reflect-metadata";
import "es6-shim";

import { bootstrap } from "angular2/platform/browser";
import {About} from "./about";

bootstrap(About).catch(err => console.error(err));

LIB / about.ts 

import { Component } from "angular2/core";

@Component({
    selector: "about-page",
    template: `
        <h2>About</h2>
        This widget shows the weather forecast of Utrecht.
        The next 24 hours are shown under 'Today' and the forecast of 24-48 hours ahead under 'Tomorrow'.
        `
})
export class About {

}

LIB / tsconfig.json 

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "lib": ["es2015", "dom"]
    }
}

gulpfile.js 

var gulp = require('gulp');
var typescript = require('gulp-typescript');
var small = require('small').gulp;
var sourcemaps = require('gulp-sourcemaps');
var uglify = require('gulp-uglify');

var tsProject = typescript.createProject('lib/tsconfig.json', {
    typescript: require('typescript')
});

gulp.task('compile', function() {
    return gulp.src('lib/**/*.ts')
        .pipe(sourcemaps.init())
        .pipe(tsProject())
        .pipe(small('index.js', {
            externalResolve: ['node_modules'],
            globalModules: {
                "crypto": {
                    standalone: "undefined"
                }
            }
        }))
        .pipe(sourcemaps.write('.'))
        .pipe(gulp.dest('static/scripts'));
});
gulp.task('release', ['compile'], function() {
    return gulp.src('static/scripts/scripts.js')
        .pipe(uglify())
        .pipe(gulp.dest('static/scripts'));
});

gulp.task('default', ['compile']);

静态/ index.html中

<!DOCTYPE HTML>
<html>
    <head>
        <title>Weather</title>
        <link rel="stylesheet" href="style.css" />
    </head>
    <body>
        <div id="wrapper">
            <about-page>Loading..</about-page>
        </div>
        <script src="scripts/index.js" type="text/javascript"></script>
    </body>
</html>

然后我运行“gulp”，我在浏览器中加载index.html并得到该错误。

我有一个动态创建的node_modules文件夹，其中包含一个angular2文件夹...

提前致谢。

编辑：我检查了我的index.js生成的文件和

var RuntimeMetadataResolver = (function () {

存在。 而且，

exports.COMPILER_PROVIDERS

包含

__small$_xxx.RuntimeMetadataResolver

EDIT2：npm ls命令

没有错误

3 个答案:

答案 0 :(得分：1)

这似乎不是Angular和TypeScript的问题，但模块捆绑器Small有一个bug。文件a/b可以编译两次（在条件下），即a/b和a\b。这只发生在Windows上。这破坏了Angular的一些功能。您可以尝试更新为small@0.2.8吗？

答案 1 :(得分：0)

尝试从beta升级到最新版本的angular并尝试。

尝试使用“npm update”

答案 2 :(得分：-1)

您应该根据documentation在根模块类中导入它。 在你的情况下应该是：

@NgModule({
  imports:      [ BrowserModule, RuntimeMetadataResolver],
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }
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